SAS Fastload Sleep and Tenacity & SessDalyed

I could be a bit vague in describing the scenario but I'll give it my best shot.

Are there any recommendations around setting or otherwise of the 'sleep' and 'tenacity' parameters for a FASTLOAD through SAS when we are on a database version that allows utility sessions to be delayed (SESSDELAYED) rather than just rejected when limit is reached?

We have been facing an issue at a client site for some weeks where the SAS Fastloads appear to end in error (or even finish sometimes) at the client end however they keep on holding the utility slot until they are manually killed.

SAS version is 9.1 and TDBMS is 12.00.03.33

Could it be the issue described in the following link (though it says its for SAS 9.2)?